diff --git a/SuperBuild/CMake/External_qwt.cmake b/SuperBuild/CMake/External_qwt.cmake
index 9e97c83228f7d17c30c31c2695cf37d6f69633d1..0bf4da29f63bd9cec07fc8ffc04391a0f7dcaa40 100644
--- a/SuperBuild/CMake/External_qwt.cmake
+++ b/SuperBuild/CMake/External_qwt.cmake
@@ -55,8 +55,8 @@ endif()
 
 ExternalProject_Add(QWT
   PREFIX QWT
-  URL "http://downloads.sourceforge.net/project/qwt/qwt/6.1.3/qwt-6.1.3.zip"
-  URL_MD5 558911df37aee4c0c3049860e967401c
+  URL "http://downloads.sourceforge.net/project/qwt/qwt/6.1.5/qwt-6.1.5.zip"
+  URL_MD5 61a8cae35ab6201d916304ec4a6f06b8
   SOURCE_DIR ${QWT_SB_SRC}
   BINARY_DIR ${QWT_SB_SRC}
   INSTALL_DIR ${SB_INSTALL_PREFIX}
diff --git a/SuperBuild/patches/QWT/qwt-1-releaseBuild-all.diff b/SuperBuild/patches/QWT/qwt-1-releaseBuild-all.diff
index 3d4f6a55954d6fbeeb3a69ba3d66ac4faa7fd9c5..ad34cd24bdfcf46174ac2699e8bfd285ab5c184c 100644
--- a/SuperBuild/patches/QWT/qwt-1-releaseBuild-all.diff
+++ b/SuperBuild/patches/QWT/qwt-1-releaseBuild-all.diff
@@ -8,7 +8,7 @@ diff -burN qwt-6.1.3-orig/qwtbuild.pri qwt-6.1.3/qwtbuild.pri
 -    # On Windows you can't mix release and debug libraries.
 -    # The designer is built in release mode. If you like to use it
 -    # you need a release version. For your own application development you
--    # might need a debug version. 
+-    # might need a debug version.
 -    # Enable debug_and_release + build_all if you want to build both.
  
 -    CONFIG           += debug_and_release